Interlocking joint.



T. s. HOLLAND. INTERLOGKING JOINT. APPLICATION FILED NOV. 6, 1911.

Patented July 16, 1912 nn'rnn'r onnion.

THOMAS S. HOLLAND, OI TACOMA, WASHINGTON.

INTERLOCKING" JOINT.

Specification of Lette s Patent.

Application filed November To all whom "it may concern lle it known that l, THOMAS S. I-loLLANo, 3 a citizen ot the ilnited States, residing at 'laconia, in the county of Pierce and State oi l fashington, have invented certain new j and usetulimprovements 1n Interlocking ,l oints, of which the. following is a specitiea men.

This invention relates to joints of a character particularly useful in joining parts constituting columns, but which are applicable in joining the parts, particularly of wood, of other structures where such parts are to be secured at angles to each other.

The primary object of the invention is to provide a joint of the character referred to,

wherein the parts shall be so formed at their .nieeting edges as to prevent the breaking or splitting which usually result in the usual forms of joints.

A 'llirther object of the invention is to provide a joint ot a 'FUl'lll permitting the attachnzent of parts in a permanent manner without the use of nails. glue or other means for securing the parts together.

With these objects in view the invention consists essentially of a joint tornled by providing one part to be joined with a groove A having extending into ita rib or elongated projection, extending SlllJSttllltially parallel to the outer face of the part. and by providing the other part to be joined with a tenon having therein a groove or way for receiving the rib or projection which extends into the groove or opening of the first part. i

The invention consists further in various gene i0 and specific details of constuletion and combinations of parts, substantially as hereinafter described and claimed.

The invention is illust ated in the accompanying drawing, in which;

Figure 1 is a horizontal sectional view of a rectangular structure having the parts thereof connected by my improved joints; Fig. 2 is a detail plan view of a part having therein a groove or opening; Fig. 3 is a view of a part having a tenon adapted to enter the groove or opening of the part shown in Fig. 2; and Fig. 4 is a fragmentary view of a modified form of joint.

As shown the joint is formed by provid ing one part to be connected, as the portion Patented July 16, 1912.

e, 1911. Serial No. 658,747.

j l, with one or more longitudinally disposed grooves 2, into the bottom of which extends a rib or projection 25 which may be angular j as shown in Figs. 1 and of the drawing or curved, as shown in Fig. t. The rib or projection extends substantially parallel to the face of the part 1 and forms when the coacting portion of another partto be joined is introduced into the groove or opening, an abutment to resist strains which would otherwise be imparted wholly upon the thin bodies of wood between the grooves or openings and the faces of the part 1. The other part 4 be connected has. formed on its edge a tenon or tenons 5, having on its outer end face a groove or way of a form corresponding to the shape of the rib or projection of the part 1 and of a size to closely confine the rib .or projection.

In order to adapt the joint for securing the parts together securely without the use of other means such as nails, screws, glue or the like, one side of the grooves 2 has an undercut (3. and the tenon at one side eX- tends outward toward its end. Each part 4 has adjacent. to the base of the tenon a shoulder T which when the parts are joined bears directly against the side of the part- 1. The parts formed as described are joined bvintroducing the lotion on the part 4 lon-' gitudinally into the groove 2 of the part 1, and in this way a lirui joint preventing the separation of the parts without the use of extraneous means. and one which will be secure against splitting or breaking of the parts u ar the joint is ell'erted. Having thus described my inventioinwhat I claim as new is:

A joint comprising one part to be joined having an opening or groove parallel with the edge of the part. the groove having a bottom wall. and a second part provided with a tenon having therein a groove or way of a size and shape to receive and confine the rib or projection.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS S. HOLLAND.

ll'itnesses:

' H. Van .Ncys,

Gno. H. Kine.

rib or projection extending into it from the 

